 .black_overlay{ 
            display: none; 
            position: absolute; 
            top: 0%; 
            left: 0%; 
            width: 200%; 
            height: 300%; 
            background-color: black; 
            z-index:1001; 
            -moz-opacity: 0.8; 
            opacity:.80; 
            filter: alpha(opacity=88); 
        } 
        .white_content { 
            display: none; 
            position: absolute; 
            top: 25%; 
            left: 25%; 
            width: 45%; 
            height: 70%; 
            padding: 20px; 
            border: 10px solid lightblue; 
            background-color: white; 
            z-index:1002; 
            overflow: auto; 
        } 
        #title
        {
         color:red; 
         font-size:20px;
        }
         
        #change
        {
          position: absolute; 
           top: 75%; 
            left: 25%;
          
        }
       #chang
       {
         margin:25px;
       }